Electric vehicle charging assembly temperature monitoring method and system

Abstract

The application relates to a temperature monitoring method of an electric vehicle charging assembly, comprising the following steps: a redundancy acquisition step: at least two temperature acquisition units redundantly arranged in the charging assembly are used to respectively acquire the temperature of the charging assembly; a working condition identification step: it is identified that the electric vehicle is currently in a charging mode or a driving mode; a temperature monitoring and fault detection step: in the charging mode, according to the temperature values acquired by the at least two temperature acquisition units, temperature overrun judgment and sensor fault judgment are respectively performed; in the driving mode, sensor fault judgment is performed; a safety protection step: according to the temperature overrun judgment result or the sensor fault judgment result, a safety protection operation corresponding to the fault type is performed, and the safety protection operation at least includes one or more of the following: reducing a charging current, stopping charging and prohibiting starting charging.

Description

Technical Field

[0001] This application relates to the field of electric vehicle charging technology, specifically to a method and system for monitoring the temperature of an electric vehicle charging component. Background Technology

[0002] Pure electric vehicles and hybrid electric vehicles, as clean energy transportation tools, have become an important development direction for the global automotive industry. Electric vehicles are powered by high-voltage batteries, which need to be connected to the vehicle's charging socket via a charging plug to charge the high-voltage batteries using an external power source. With the rapid growth in the number of electric vehicles and their increasing usage frequency, the safety issues of charging systems are becoming increasingly prominent.

[0003] During charging, repeated plugging and unplugging of the charging plug and the vehicle's charging socket can gradually increase the contact resistance between the conductors. When the contact resistance increases, more heat is generated at the conductor contact points under the influence of the charging current, causing the temperature to rise continuously and posing a safety risk of thermal hazards or even fire. Therefore, real-time temperature monitoring and early warning of the charging system are crucial for ensuring the safety of occupants and those around the vehicle.

[0004] In current common electric vehicle charging temperature monitoring solutions, the battery management system (BMS) monitors the temperature of the high-voltage charging port in real time using a single temperature sensor, whether the vehicle is in DC or AC charging mode. When the temperature of the charging port exceeds a certain limit, the BMS reduces the charging current; when the temperature exceeds the maximum limit, the BMS stops charging and disconnects the positive and negative charging contactors.

[0005] However, this approach has the following shortcomings: First, the temperature sampling circuit is equipped with only a single temperature sensor, which cannot fully cover the temperature status of multiple high-voltage terminals of the high-voltage charging port. When the sensor fails, the entire temperature monitoring function fails, posing a single point of failure risk. Second, when the temperature sensor experiences a random hardware failure (such as open circuit, short circuit, offset, etc.), the system cannot effectively identify and diagnose the fault type, leading to temperature monitoring failure and posing a potential safety hazard of fire caused by excessively high charging temperature.

[0006] Therefore, there is a need for a temperature monitoring technology solution for electric vehicle charging components that can avoid single-point failures and has the ability to diagnose random hardware faults. Summary of the Invention

[0007] In view of the above problems, the following technical solution is provided: The temperature monitoring method for an electric vehicle charging component of this application includes: a redundant acquisition step: acquiring the temperature of the charging component through at least two redundantly configured temperature acquisition units; a working condition identification step: identifying whether the electric vehicle is currently in charging mode or driving mode; a temperature monitoring and fault detection step: in the charging mode, performing temperature over-limit judgment and sensor fault judgment based on the temperature values ​​acquired by the at least two temperature acquisition units; in the driving mode, performing sensor fault judgment; and a safety protection step: based on the temperature over-limit judgment result or the sensor fault judgment result, performing a safety protection operation corresponding to the fault type, wherein the safety protection operation includes at least one or more of reducing the charging current, stopping charging, and prohibiting the start of charging.

[0008] Optionally, the sensor fault determination includes: detecting an open circuit fault in a single temperature acquisition unit; detecting a short circuit between a single temperature acquisition unit and the power supply or to ground; and detecting whether the temperature deviation between any two temperature acquisition units exceeds a preset deviation threshold.

[0009] Optionally, the temperature deviation judgment specifically includes: when the temperature deviation between any two temperature acquisition units exceeds a first deviation threshold, performing a safety protection operation to reduce the charging current; after the charging current is reduced for a first preset time, if the temperature deviation still exceeds a second deviation threshold, performing a safety protection operation to stop charging.

[0010] Optionally, the temperature over-limit judgment includes: when the temperature value collected by any temperature acquisition unit exceeds a first temperature threshold, performing a safety protection operation to reduce the charging current; when the temperature value collected by any temperature acquisition unit exceeds a second temperature threshold, performing a safety protection operation to stop charging, wherein the second temperature threshold is greater than the first temperature threshold.

[0011] Optionally, the sensor fault determination further includes: detecting at least one system-level fault among controller fault, memory fault, clock fault, and power supply fault in the battery management system; and when the system-level fault is detected, performing a safety protection operation to stop charging or prevent charging from starting.

[0012] Optionally, after performing sensor fault judgment in the driving mode, if any sensor fault is detected or the temperature deviation between any two temperature acquisition units exceeds a preset threshold, a safety protection operation to prevent charging from starting is performed.

[0013] The temperature monitoring system for an electric vehicle charging component of this application includes: a redundant temperature acquisition unit, redundantly configured on the charging component, for acquiring the temperature of the charging component; a battery management system, connected to the redundant temperature acquisition unit, for identifying whether the electric vehicle is currently in charging mode or driving mode; in the charging mode, performing temperature over-limit judgment and sensor fault judgment based on the temperature values ​​acquired by the redundant temperature acquisition unit; in the driving mode, performing sensor fault judgment; and generating corresponding safety protection commands based on the judgment results; and a power battery, connected to the battery management system, for receiving the safety protection commands and performing corresponding safety protection operations, wherein the safety protection operations include at least one or more of reducing charging current, stopping charging, and prohibiting the start of charging.

[0014] Optionally, the sensor fault judgment performed by the battery management system includes: detecting an open circuit fault in a single temperature acquisition unit; detecting a short circuit between a single temperature acquisition unit and the power supply or to ground; and detecting whether the temperature deviation between any two temperature acquisition units exceeds a preset deviation threshold.

[0015] Optionally, the temperature deviation judgment performed by the battery management system specifically includes: when the temperature deviation between any two temperature acquisition units exceeds a first deviation threshold, generating a safety protection command to reduce the charging current; and after the charging current is reduced for a first preset time, if the temperature deviation still exceeds a second deviation threshold, generating a safety protection command to stop charging.

[0016] Optionally, the temperature over-limit judgment performed by the battery management system includes: generating a safety protection command to reduce the charging current when the temperature value collected by any temperature acquisition unit exceeds a first temperature threshold; and generating a safety protection command to stop charging when the temperature value collected by any temperature acquisition unit exceeds a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold.

[0017] Optionally, the battery management system is further configured to: detect at least one system-level fault among its own controller fault, memory fault, clock fault, and power supply fault; and when the system-level fault is detected, generate a safety protection command to stop charging or prevent charging from starting.

[0018] Optionally, in the driving mode, after the battery management system performs sensor fault judgment, if any sensor fault is detected or the temperature deviation between any two temperature acquisition units exceeds a preset threshold, a safety protection command to prohibit charging from starting is generated.

[0019] Optionally, the power battery includes a positive charging contactor and a negative charging contactor, and the safety protection operation to stop charging is achieved by the power battery disconnecting the positive charging contactor and the negative charging contactor.

[0020] The present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method.

[0021] The computer device of this application includes a storage module, a processor, and a computer program stored on the storage module and executable on the processor, wherein the processor implements the above-described method when executing the computer program.

[0022] The computer program product of this application includes a computer program that, when executed by a processor, implements the above-described method. Attached Figure Description

[0023] The above and / or other aspects and advantages of this application will become clearer and more readily understood from the following description taken in conjunction with the accompanying drawings, in which the same or similar elements are denoted by the same reference numerals. In the drawings: Figure 1 A schematic flowchart of a temperature monitoring method for an electric vehicle charging assembly according to an embodiment of this application is shown; Figure 2 A schematic block diagram of a temperature monitoring system for an electric vehicle charging assembly according to an embodiment of this application is shown. Detailed Implementation

[0024] The following detailed description is merely exemplary in nature and is not intended to limit the disclosed technology or its application and use. Furthermore, it is not intended to be bound by any express or implied theory presented in the foregoing technical fields, background art, or the following detailed description.

[0025] In the following detailed description of the embodiments, numerous specific details are set forth in order to provide a more thorough understanding of the disclosed technology. However, it will be apparent to those skilled in the art that the disclosed technology can be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid unnecessarily complicating the description.

[0026] Terms such as “comprising” and “including” indicate that, in addition to the units and steps that are directly and explicitly stated in the specification, the technical solution of this application does not exclude the presence of other units and steps that are not directly or explicitly stated.

[0027] In the following, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings.

[0028] Now for reference Figure 1 , Figure 1A schematic flowchart of a temperature monitoring method for an electric vehicle charging assembly according to an embodiment of this application is shown.

[0029] like Figure 1 As shown, the temperature monitoring method 100 for electric vehicle charging components includes: S110 Redundant Acquisition Step: The temperature of the charging component is acquired by at least two temperature acquisition units redundantly set on the charging component.

[0030] In some embodiments, the charging component is a high-voltage charging port, which integrates two independently configured temperature sensors. These two temperature sensors are used to collect the temperature of different high-voltage terminals in the charging component, such as the positive and negative high-voltage terminals of the high-voltage charging port. Through redundancy, the two temperature sensors can represent the temperature of all high-voltage terminals of the high-voltage charging port, thereby avoiding temperature monitoring blind spots caused by the failure of a single sensor.

[0031] S120 Operating Condition Identification Steps: Identify whether the electric vehicle is currently in charging mode or driving mode.

[0032] Specifically, the Battery Management System (BMS) identifies the current operating condition based on the vehicle's status. Charging modes include DC charging and AC charging, where the vehicle is connected to an external power source to charge the high-voltage battery; driving mode refers to when the vehicle is in motion, and the charging components are not charging. Temperature monitoring and fault detection strategies differ under different operating conditions.

[0033] S130 Temperature Monitoring and Fault Detection Steps: In the charging mode, temperature over-limit judgment and sensor fault judgment are performed respectively based on the temperature values ​​collected by the at least two temperature acquisition units; in the driving mode, sensor fault judgment is performed.

[0034] In charging mode, the temperature over-limit judgment specifically includes: triggering a temperature over-limit warning when the temperature value collected by any temperature acquisition unit exceeds a first temperature threshold (e.g., X1℃); and triggering temperature over-limit protection when the temperature value collected by any temperature acquisition unit exceeds a second temperature threshold (e.g., X2℃), where the second temperature threshold is greater than the first temperature threshold. By setting two temperature thresholds, a graded protection mechanism is implemented, taking current-reducing measures in the early stages of temperature anomalies and promptly cutting off charging when the temperature reaches a dangerous threshold.

[0035] Sensor fault diagnosis includes various types of fault detection: detecting open-circuit faults in a single temperature acquisition unit; detecting short circuits between a single temperature acquisition unit and the power supply or to ground; and detecting whether the temperature deviation between any two temperature acquisition units exceeds a preset deviation threshold (e.g., X3℃ or X4℃). These fault detections can cover common random hardware faults in the temperature monitoring loop, improving the safety and reliability of the system.

[0036] In addition, sensor fault diagnosis also includes system-level fault detection: detecting at least one of the following in the battery management system: controller fault, memory fault, clock fault, and power supply fault. When these system-level faults are detected, it indicates that the core processing unit for temperature monitoring is at risk of failure, and corresponding safety protection measures need to be taken.

[0037] In drive mode, since the charging components are not charging, the main function is to determine sensor faults and prepare for the next charge. Specifically, this involves detecting open-circuit and short-circuit faults in individual temperature acquisition units, as well as whether the temperature deviation between any two temperature acquisition units exceeds a preset threshold. Additionally, temperature deviations can be detected after a preset driving time (e.g., T2 time) to ensure that the sensors remain in normal working order during long-term use.

[0038] S140 Safety Protection Steps: Based on the temperature over-limit judgment result or the sensor fault judgment result, execute the safety protection operation corresponding to the fault type. The safety protection operation includes at least one or more of the following: reducing the charging current, stopping charging, and prohibiting the start of charging.

[0039] Specifically, in charging mode, the execution logic of the safety protection operation is as follows: When the temperature exceeds the limit and the temperature value of any temperature acquisition unit exceeds the first temperature threshold, a safety protection operation to reduce the charging current is executed to slow down the rate of temperature rise. When the temperature exceeds the limit and the temperature value of any temperature acquisition unit exceeds the second temperature threshold, a safety protection operation to stop charging is executed, disconnecting the charging circuit to prevent thermal hazards. When the sensor fault diagnosis result indicates that an open circuit or short circuit fault has been detected in a single temperature acquisition unit, a safety protection operation to stop charging is executed. When the sensor fault judgment result is that the temperature deviation between any two temperature acquisition units exceeds the first deviation threshold (e.g., X3℃), a safety protection operation of reducing the charging current is executed; after the charging current is reduced for a first preset time (e.g., time T1), if the temperature deviation still exceeds the second deviation threshold (e.g., X4℃), a safety protection operation of stopping charging is executed; if the temperature deviation recovers to not exceed the second deviation threshold, the original charging current is restored. When the sensor fault diagnosis result indicates that a system-level fault (controller, memory, clock, power supply failure) has been detected, a safety protection operation to stop charging is executed.

[0040] In driver mode, the execution logic of safety protection operations is as follows: When the sensor fault diagnosis result indicates that an open circuit or short circuit fault has been detected in a single temperature acquisition unit, a safety protection operation to prevent charging from starting is executed, that is, charging is refused to start on the next charging request. When the sensor fault diagnosis result is that the temperature difference between any two temperature acquisition units exceeds the preset threshold, a safety protection operation to prevent charging from starting is executed. When the sensor fault diagnosis result indicates that a system-level fault has been detected, a safety protection operation to prevent charging from starting is executed.

[0041] The above method enables comprehensive monitoring of the temperature of electric vehicle charging components. In charging mode, it can respond promptly to temperature anomalies and sensor malfunctions, and in driving mode, it can identify potential faults in advance and prohibit charging, thereby effectively avoiding the risk of thermal hazards caused by temperature monitoring failure.

[0042] Now for reference Figure 2 , Figure 2 A schematic block diagram of a temperature monitoring system for an electric vehicle charging assembly according to an embodiment of this application is shown.

[0043] like Figure 2 As shown, the temperature monitoring system 200 includes: a redundant temperature acquisition unit 210, a battery management system 220, and a power battery 230.

[0044] A redundant temperature acquisition unit 210 is redundantly configured on the charging component to acquire the temperature of the charging component separately.

[0045] In some embodiments, the redundant temperature acquisition unit 210 includes two independently configured temperature sensors, each located at a different position on the high-voltage charging port, for example, one near the positive high-voltage terminal and the other near the negative high-voltage terminal, to acquire the temperature of different high-voltage terminals respectively. The independent configuration of the two temperature sensors achieves redundancy in temperature sampling; even if one sensor fails, the other sensor can still provide valid temperature information. Furthermore, by comparing the temperature values ​​of the two sensors, random hardware failures such as sensor drift can be detected.

[0046] The battery management system 220 is connected to the redundant temperature acquisition unit 210 and is used to identify whether the electric vehicle is currently in charging mode or driving mode. In the charging mode, it performs temperature over-limit judgment and sensor fault judgment respectively based on the temperature value collected by the redundant temperature acquisition unit. In the driving mode, it performs sensor fault judgment and generates corresponding safety protection commands based on the judgment results.

[0047] The battery management system 220, as the core processing unit for temperature monitoring, is responsible for real-time temperature monitoring, fault diagnosis, and the generation of safety protection commands. Specifically, the battery management system 220 performs the following judgments: Temperature over-limit judgment: When the temperature value collected by any temperature acquisition unit exceeds the first temperature threshold, a safety protection command to reduce the charging current is generated; when the temperature value collected by any temperature acquisition unit exceeds the second temperature threshold, a safety protection command to stop charging is generated, wherein the second temperature threshold is greater than the first temperature threshold.

[0048] Sensor fault diagnosis: Detects open-circuit faults in a single temperature acquisition unit; detects short-circuit faults between a single temperature acquisition unit and the power supply or to ground; detects whether the temperature deviation between any two temperature acquisition units exceeds a preset deviation threshold. When the temperature deviation between any two temperature acquisition units exceeds a first deviation threshold, a safety protection command to reduce the charging current is generated; after reducing the charging current for a first preset time, if the temperature deviation still exceeds a second deviation threshold, a safety protection command to stop charging is generated.

[0049] System-level fault diagnosis: Detects at least one of the following faults in the battery management system: controller fault, memory fault, clock fault, and power supply fault; when the system-level fault is detected, generates a safety protection command to stop charging or prevent charging from starting.

[0050] In drive mode, after the battery management system 220 performs sensor fault judgment, if any sensor fault is detected or the temperature deviation between any two temperature acquisition units exceeds a preset threshold, a safety protection command to prohibit charging from starting is generated.

[0051] The power battery 230 is connected to the battery management system 220 and is used to receive the safety protection command and execute the corresponding safety protection operation. The safety protection operation includes at least one or more of the following: reducing the charging current, stopping charging, and prohibiting the start of charging.

[0052] The power battery 230 acts as an execution unit, performing corresponding physical operations according to the safety protection commands generated by the battery management system 220. In some embodiments, the power battery 230 includes a positive charging contactor and a negative charging contactor. The safety protection operation of stopping charging is achieved by the power battery 230 disconnecting the positive charging contactor and the negative charging contactor. The safety protection operation of reducing the charging current is achieved by the power battery 230 adjusting the charging power according to the commands of the battery management system 220. The safety protection operation of preventing the start of charging is achieved by the power battery 230 refusing to close the charging contactor when it receives a charging request.

[0053] Through the above system architecture, the redundant temperature acquisition unit 210 provides dual temperature signals, the battery management system 220 makes intelligent judgments and decisions, and the power battery 230 performs safety protection actions. The three work together to achieve comprehensive monitoring and reliable protection of the temperature of the electric vehicle charging components, effectively solving the problem of single-point failure and random hardware faults that cannot be identified in the existing technology.

[0054] The temperature monitoring method and system for electric vehicle charging components provided in this application achieve redundant temperature sampling by integrating two independent temperature sensors into the charging component, thus avoiding the risk of single-point failure. Real-time monitoring of the two temperature sensors by the battery management system can detect random hardware faults such as open circuits, short circuits, and drift, as well as system-level faults such as those in the controller, memory, clock, and power supply, and implement differentiated safety protection strategies under different operating conditions. In charging mode, when an abnormal temperature or fault is detected, the charging current is promptly reduced or charging is stopped; in driving mode, faults are identified in advance and subsequent charging is prohibited, thereby effectively preventing the risk of overheating due to temperature monitoring failure and significantly improving the safety and reliability of the electric vehicle charging system.

[0055] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the processing method described above. The computer-readable medium referred to in this application includes various types of computer storage media, and can be any available medium accessible to a general-purpose or special-purpose computer. For example, a computer-readable medium may include RAM, ROM, EPROM, E2PROM, registers, hard disk, removable disk, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or any other temporary or non-temporary medium capable of carrying or storing desired program code units having the form of instructions or data structures and accessible by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. As used herein, disks typically magnetically copy data, while discs optically copy data using lasers. Combinations of the above should also be included within the scope of protection of computer-readable media. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and storage media can reside as discrete components in the user terminal (e.g., in-vehicle systems, external diagnostic devices).

[0056] This application also provides a computer device, including a storage module, a processor, and a computer program stored on the storage module and executable on the processor, wherein the processor executes the computer program to implement the processing method of this application described above.

[0057] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the processing method described above.

[0058] The specific embodiments described above are merely for the purpose of more clearly illustrating the principles of this application, wherein the various components are clearly shown or described to make the principles of this application easier to understand. Various modifications or variations can be easily made to this application by those skilled in the art without departing from the scope of this application. Therefore, it should be understood that all such modifications or variations should be included within the patent protection scope of this application.

Claims

1. A method for monitoring the temperature of an electric vehicle charging component, characterized in that, include: Redundant acquisition steps: The temperature of the charging component is acquired by at least two temperature acquisition units redundantly set on the charging component. Operating condition identification steps: Identify whether the electric vehicle is currently in charging mode or driving mode; Temperature monitoring and fault detection steps: In the charging mode, temperature over-limit judgment and sensor fault judgment are performed respectively based on the temperature values ​​collected by the at least two temperature acquisition units; in the driving mode, sensor fault judgment is performed. Safety protection steps: Based on the temperature over-limit judgment result or the sensor fault judgment result, execute the safety protection operation corresponding to the fault type. The safety protection operation includes at least one or more of the following: reducing the charging current, stopping charging, and prohibiting the start of charging.

2. The method according to claim 1, characterized in that, The sensor fault diagnosis includes: Detect open-circuit faults in individual temperature acquisition units; Detect faults such as short circuit to power supply or short circuit to ground in a single temperature acquisition unit; Detect whether the temperature deviation between any two temperature acquisition units exceeds a preset deviation threshold.

3. The method according to claim 2, characterized in that, The temperature deviation judgment specifically includes: When the temperature difference between any two temperature acquisition units exceeds the first deviation threshold, a safety protection operation to reduce the charging current is executed. If the temperature deviation still exceeds the second deviation threshold after the charging current has been reduced for a first preset time, a safety protection operation to stop charging will be performed.

4. The method according to claim 1, characterized in that, The temperature exceeding the limit judgment includes: When the temperature value collected by any temperature acquisition unit exceeds the first temperature threshold, a safety protection operation to reduce the charging current is executed. When the temperature value collected by any temperature acquisition unit exceeds the second temperature threshold, a safety protection operation to stop charging is executed, wherein the second temperature threshold is greater than the first temperature threshold.

5. The method according to claim 1, characterized in that, The sensor fault diagnosis also includes: Detect at least one system-level fault in the battery management system, including controller fault, memory fault, clock fault, and power supply fault; When the system-level fault is detected, a safety protection operation is performed to stop charging or prevent charging from starting.

6. The method according to claim 1, characterized in that, After performing sensor fault judgment in the driving mode, if any sensor fault is detected or the temperature deviation between any two temperature acquisition units exceeds a preset threshold, a safety protection operation to prevent charging from starting is executed.

7. A temperature monitoring system for an electric vehicle charging component, characterized in that, include: A redundant temperature acquisition unit is redundantly set in the charging component to acquire the temperature of the charging component respectively. The battery management system, connected to the redundant temperature acquisition unit, is used to identify whether the electric vehicle is currently in charging mode or driving mode. In the charging mode, temperature over-limit judgment and sensor fault judgment are performed respectively based on the temperature value collected by the redundant temperature acquisition unit; in the driving mode, sensor fault judgment is performed; and corresponding safety protection instructions are generated based on the judgment results. The power battery is connected to the battery management system and is used to receive the safety protection command and execute the corresponding safety protection operation. The safety protection operation includes at least one or more of the following: reducing the charging current, stopping charging, and prohibiting the start of charging.

8. The system according to claim 7, characterized in that, The redundant temperature acquisition unit includes two independently configured temperature sensors, which are used to acquire the temperature of different high-voltage terminals in the charging assembly.

9. The system according to claim 7, characterized in that, The sensor fault determination performed by the battery management system includes: Detect open-circuit faults in individual temperature acquisition units; Detect faults such as short circuit to power supply or short circuit to ground in a single temperature acquisition unit; Detect whether the temperature deviation between any two temperature acquisition units exceeds a preset deviation threshold.

10. The system according to claim 9, characterized in that, The temperature deviation judgment performed by the battery management system specifically includes: When the temperature difference between any two temperature acquisition units exceeds the first deviation threshold, a safety protection command to reduce the charging current is generated. If the temperature deviation still exceeds the second deviation threshold after the charging current has been reduced for a first preset time, a safety protection command to stop charging is generated.

11. The system according to claim 7, characterized in that, The temperature over-limit judgment performed by the battery management system includes: When the temperature value collected by any temperature acquisition unit exceeds the first temperature threshold, a safety protection command to reduce the charging current is generated. When the temperature value collected by any temperature acquisition unit exceeds the second temperature threshold, a safety protection command to stop charging is generated, wherein the second temperature threshold is greater than the first temperature threshold.

12. The system according to claim 7, characterized in that, The battery management system is also used for: It can detect at least one system-level fault among its own controller fault, memory fault, clock fault, and power supply fault; When the system-level fault is detected, a safety protection command is generated to stop charging or prevent charging from starting.

13. The system according to claim 7, characterized in that, In the driving mode, after the battery management system performs sensor fault judgment, if any sensor fault is detected or the temperature deviation between any two temperature acquisition units exceeds a preset threshold, a safety protection command to prohibit charging from starting is generated.

14. The system according to claim 7, characterized in that, The power battery includes a positive charging contactor and a negative charging contactor. The safety protection operation to stop charging is achieved by the power battery disconnecting the positive charging contactor and the negative charging contactor.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method described in claims 1-6.

16. A computer device comprising a storage module, a processor, and a computer program stored on the storage module and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method described in claims 1-6.

17. A computer program product comprising a computer program that, when executed by a processor, implements the method of claims 1-6.

Images